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Irenesauripus occidentalis new species 
Plate III, figure 1; and Figure 3 
Type. Cat. No. 8550, Geol. Surv., Canada, consists of trackway of 
four large tracks. 
Locality and, Horizon. Peace River canyon, north side, about 1* 
miles upstream from Gething’s mine, on a stratum 262 feet above Grant 
seam, Gething member of Bullhead Mountain formation. 
Description. Tracks large; heel broad; toes narrow but well spread; 
stride short; trackway moderately broad. Greatest length of track, from 
centre of posterior edge of heel to tip of digit III, 500 mm., from same 
point to dip of digit II, 400 mm.; to tip of digit IV, 400 mm. Breadth of 
track, across digits II and IV, 465 mm. Divarication of digits II and III, 
33 degrees; of III and IV, 40 degrees. Length of stride 960 to 1,000 mm. 
These tracks are preserved on very fine-grained, thin-bedded, ripple- 
marked sandstone. The impressions are shallow. The shortness of the 
stride and the width of the trackway may be partly due to slow movement 
of the animal when making the tracks. 
Genus, Columbosauripus 1 new genus 
Genotype, Columbosauripus ungulatus new species 
Generic Characters. Small; bipedal; semidigitigrade; functionally 
tridactyle; toes well spread and carrying the main weight; proximal ends 
of toes enclosed in pad or web; digit II not cut away from metatarsal pads; 
toes tapering and terminating in long, sharp claws; heel well rounded; 
phalangial pads not well shown. 
This genus might be correlated with one of the smaller carnivorous 
forms. It is tentatively referred to the family Grallatoridae established 
by Lull (Loc. cit.). 
Columbosauripus ungulatus new species 
Plate III, figure 3; and Figure 4 
Type. Cat. No. 8551, Geol. Surv., Canada, consists of one original 
imprint of left (?) pes. 
Locality and Horizon. Peace River canyon, north side, about 
miles upstream from Gething's mine, on a stratum 213 feet above Grant 
seam, Gething member of Bullhead Mountain formation. 
Description. This imprint shows very good detail, but no distinct 
phalangial pads. The digits are distinctly separated in their distal halves. 
The pads of the proximal phalangies and the metatarsals seem to have 
been merged into one big pad, as there is no sign of separation between 
them. The heel is broadly rounded, but only faintly impressed. The 
'This generic name signifies the foot of a saurian from British Columbia. 
